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Literature summary extracted from

  • Itoh, T.; Uda, Y.
    alpha-N-Acetylgalactosaminidase from squid liver: purification and characterization of two enzymes (1984), J. Biochem., 95, 959-970.
    View publication on PubMed

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.2.1.49 Ag+ isoenzyme II Todarodes pacificus
3.2.1.49 Cu2+ isoenzyme II Todarodes pacificus
3.2.1.49 D-galactose isoenzyme I Todarodes pacificus
3.2.1.49 Hg2+ isoenzyme II Todarodes pacificus
3.2.1.49 N-acetylgalactosamine
-
Todarodes pacificus

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.2.1.49 1.55
-
4-nitrophenyl alpha-N-acetylgalactosaminide isoenzyme II Todarodes pacificus
3.2.1.49 3.33
-
4-nitrophenyl alpha-N-acetylgalactosaminide isoenzyme I Todarodes pacificus

Organism

EC Number Organism UniProt Comment Textmining
3.2.1.49 Todarodes pacificus
-
squid
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.2.1.49
-
Todarodes pacificus

Source Tissue

EC Number Source Tissue Comment Organism Textmining
3.2.1.49 liver
-
Todarodes pacificus
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.2.1.49 4-nitrophenyl alpha-N-acetylgalactosaminide + H2O
-
Todarodes pacificus 4-nitrophenol + alpha-N-acetylgalactosamine
-
?

Temperature Stability [°C]

EC Number Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
3.2.1.49 50
-
isoenzyme I stable for 30 min, isoenzyme II loses activity Todarodes pacificus

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.2.1.49 2.7 3.5 isoenzyme I, p-nitrophenyl-alpha-N-acetylgalactosaminide Todarodes pacificus
3.2.1.49 4.2
-
isoenzyme II, p-nitrophenyl-alpha-N-acetylgalactosaminide Todarodes pacificus

pH Stability

EC Number pH Stability pH Stability Maximum Comment Organism
3.2.1.49 4.5 5.5 isoenzyme I Todarodes pacificus
3.2.1.49 4.5 6.5 isoenzyme II Todarodes pacificus